Their input capabilities are limited to a few buttons or numbers, or entering data takes extra time, as happens with a personal digital assistant's (PDA) handwriting-recognition capabilities.
它们的输入功能局限于几个按键或数字键，或者像个人数字助理（PDA）手写体识别功能那样，输入数据要花很长时间，它们所拥有的工作处理能力和内存都较小。
Their input capabilities are limited to a few buttons or numbers, or entering data takes extra time, as happens with a personal digital assistant's (PDA) handwriting-recognition capabilities.
它们的输入功能局限于几个按键或数字键，或者像个人数字助理（PDA）手写体识别功能那样，输入数据要花很长时间，它们所拥有的工作处理能力和内存都较小。
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